* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  .level1 {
    border: 1px solid black;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    position: absolute;
    background-color: purple;
  }
  .level2 {
    border: 1px solid black;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    position: relative;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background-color: blue;
  }
  .level3 {
    border: 1px solid black;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    position: relative;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background-color: cyan;
  }
  .level4 {
    border: 1px solid black;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    position: relative;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background-color: green;
  }
  .level5 {
    border: 1px solid black;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    position: relative;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background-color: yellow;
  }
  .level6 {
    border: 1px solid black;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    position: relative;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background-color: orange;
  }
  .level7 {
    border: 1px solid black;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    position: relative;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background-color: red;
  }
  .level8 {
    border: 1px solid black;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    position: relative;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background-color: white;
  }
  .x {
    background-color: transparent;
  }
  .y {
    position:relative;
    
    top: 45%;
    left: 40%;
  }